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Unit 1: Classification of living things – Exercises

Question 1. Answer the following questions.

a) Why is the classification of living things necessary?

Biologists divide living things into different groups. This is called classification. Dividing living things into groups helps us to understand how all the different living things in the world fit into a pattern.

b) How many different kinds of animals and plants have biologists discovered so far?

Biologists already know about more than one million different kinds of animals and more than 350,000 kinds of plants.

c) How do viruses reproduce?

Scientists say that viruses are not really alive; they can only survive by entering the cells of animals, plants, or bacteria. Once inside the cell the virus uses the cell’s materials to live and reproduce. It can make hundreds of copies of itself.

d) Are protists plants or animals?

Protists are small living things that cannot easily be classified as animals or plants.

e) How does the euglena move about in the water?

Euglena moves about in the water by a whip-like projection called a flagellum.

f) To which group do bacteria belong?

Bacteria belong to the group Monera.

g) What are the four main groups of plants?

The four main groups of plants are:

  1. algae and fungi
  2. mosses and liverworts
  3. ferns, club mosses, and horsetails
  4. seed-bearing plants

h) What are fungi made up of?

Fungi are made up of thin threads called ‘hyphae’.

i) What are lichens?

Lichens are plants that consist of fungi and algae living together.

j) How do mosses and liverworts reproduce?

Mosses and liverworts reproduce by spores formed in capsules.

Question 2. Complete the table by putting a tick or a cross into each space:

FeatureFishAmphibianReptileBirdMammal
backbone
fins
scales
lays eggs
has live babies
hair
damp skin
feathers
milk glands
gills
lungs

Question 3. State which group each of the following animals or plants belong to:

Animal/PlantGroupAnimal/PlantGroup
fernadiantumsea weedalgae
mousemammalfrogamphibian
mushroomfungiamoebaprotist
dolphinmammalpine treegymnosperm
beetleinsectbacteriamonera
roseangiospermrobinbird
troutfishmossalgae and fungi
snakereptileoctopusmolluscs
earthwormsegmented wormstarfishechinoderm

Question 4. Match the organism to its characteristics.

OrganismCharacteristics
virussimplest living organism
protistcannot be classified as plant or animal
bacteriumsmallest living things made up only one round elongated or spiral cell
algagreen plant that usually live in water
fungusnon-green plant made up of hyphae
lichenconsist of algae and fungi living together
mossbear tiny pear-shaped capsules that contain spores
ferntheir leaves are called fronds
gymnospermseed-bearing, non-flowering plant
angiospermseed-bearing, flowering plants

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